
(a)
Interpretation:
Equilibrium
Concept Introduction:
(a)

Explanation of Solution
The equilibrium reaction for imidazole with equilibrium constant
The equilibrium reaction for imidazole hydrochloride with equilibrium constant
(b)
Interpretation:
Value of
Concept Introduction:
The expression used to calculate concentration of compound is as follows:
The formula for moles is as follows:
(b)

Explanation of Solution
The formula to calculate concentration of imidazole
Here,
Substitute
The formula to calculate concentration of imidazole hydrochloride
Here,
Substitute
The expression to calculate
Here,
Substitute 7 for
Hence, value of
(c)
Interpretation:
Value of
Concept Introduction:
The expression used to calculate concentration of compound is as follows:
The formula for moles is as follows:
(c)

Explanation of Solution
The formula to calculate concentration of
Rearrange equation (4) for
Here,
Substitute
On addition of
On addition of
Since volume is same, therefore, number of moles of imidazole and imidazole hydrochloride is equal to its moles. Hence, value of
The expression to calculate
Here,
Substitute 7 for
Hence, value of
(d)
Interpretation:
Volume in milliliters of
Concept Introduction:
The equation for buffer is described by Henderson-Hasselbach equation and it is a rearranged for of equilibrium constant,
Formula to calculate
Here,
The expression used to calculate concentration of compound is as follows:
The formula for moles is as follows:
(d)

Explanation of Solution
The formula to calculate number of moles of imidazole is as follows:
Here,
Substitute
The formula to calculate concentration of
Rearrange equation (8) for
Here,
Substitute
The ICE table to calculate concentration is as follows:
In accordance to Henderson Hasselbach equation,
Substitute 7 for
Hence, volume of solution is as follows:
Hence, volume is
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Chapter 9 Solutions
EBK EXPLORING CHEMICAL ANALYSIS
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